EPR-91 Datasheet, PDF (27/36 Pages) Power Integrations, Inc. – Engineering Prototype Report for EP-91 - 12 W Power Supply using

7-Feb-2006
EP-91 12 V, 1 A, Universal Input Supply
11.5 Output Ripple Measurements
11.5.1 Ripple Measurement Technique
A modified oscilloscope test probe was used to take output ripple measurements, in order
to reduce the pickup of spurious signals. Using the probe adapter pictured in Figure 22,
the output ripple was measured with a 1 µF electrolytic, and a 0.1 µF ceramic capacitor
connected as shown.
Probe Ground
Probe Tip
Figure 22 – Oscilloscope Probe Prepared for Ripple Measurement (End Cap and Ground Lead Removed).
Page 27 of 36
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